Amon Clarence Thomas House is a historic home located at New Harmony, Posey County, Indiana. It was built in 1899, and is a 2+1⁄2-story, eclectic red brick dwelling with Queen Anne, Romanesque Revival, and Classical Revival style design elements. It has fortress-like massing and sits on a brick and limestone foundation. It features a steep hipped slate roof, projecting semi-octagonal bays, two-level porch with Ionic order columns, and arched openings. It was listed on the National Register of Historic Places in 1995.